Now that I know they don't have mounds. (which by the way I have spent hours following their marching troops all over trying to find their home mound to kill them):R
I just went out and sprayed a perimeter around the driveway and ex-pens. Hope that helps my poor pups.
Here's a kinda fun tip I found that REALLY does WORK when it comes to ants. Albeit you have to have the dog pens on concrete or any solid surface. All I can say is it's just amazing and NO dangerous chems involved.
Chalk.
STOPS ants in their tracks!
I drew a perimeter around the expens with chalk. They will NOT cross the line!
I have to admit I did spend some time drawing little circles around some of the ants and watched them keep circling to avoid touching the chalk, just to torture them for causing my dogs so much pain.:B